Located in the constellation Eridanus. Distance ranges from 680 to 1,300 light-years. Physical size is about 70 light-years. Apparent size 180' x 60'. It is believed that the nebula reflects light from Rigel, placing it at a distance of 680 light-years. There is also a view that it is illuminated by the bright stars of the Trapezium in Orion, in which case it lies at a distance of 1,300 light-years.
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